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"Pull the plug!" Delta A321 disagrees with ground power cable - Seattle

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"Pull the plug!" Delta A321 disagrees with ground power cable - Seattle

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Old 15th May 2024, 12:40
  #21 (permalink)  
 
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I always wondered why they used to suggest you remove the plug, bring it INTO the cabin. I understand it's a plug so "bigger" than the hole, but it always seemd like it would be a significant impediment to a quick egress
Turn it on it's side and chuck it out. Of course it'll fit, it's only a plug if you fit it like a plug.

https://www.youtube.com/watch?v=hCYIfrjHIKA
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Old 15th May 2024, 12:53
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Dont know if pax’s seating at these exits are briefed on this specifically.
Been a legal requirement in Australia for years.
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Old 15th May 2024, 12:56
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Originally Posted by Capn Bloggs
Turn it on it's side and chuck it out. Of course it'll fit, it's only a plug if you fit it like a plug
Understood, but that's what makes it even more strange that they didn't make this the standard procedure. I went to one safety lecture where they said people pulled the plug and passed it to the row behind them, who then passed it to the row behing them etc. With the result that there were a lot more fatalities than necessary because people were waiting to pass the plug backwards


A related issue: Why are manhole covers round?
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Old 15th May 2024, 14:13
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Anyone got a link to the ATC audio? I bet it’s hilarious. “Roll the trucks” & “Say again” times 10?

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Old 15th May 2024, 17:30
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Originally Posted by BoeingDriver99
Anyone got a link to the ATC audio? I bet it’s hilarious. “Roll the trucks” & “Say again” times 10?
I don't get any sound with the video (is that the case for everyone, or is it related to my computer?). But do we know who called for emergency services (pilot or ground), and when? If it was the flight deck, there may have been a significant lag between when the arcing started and when the flight deck realized what was going on and declared an emergency, asking for the fire crews.
In other words, condemning emergency services for their response time may be premature...
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Old 15th May 2024, 18:48
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Originally Posted by Sue Vêtements
A related issue: Why are manhole covers round?
Because that shape makes it impossible for it to fall down its hole ?
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Old 15th May 2024, 21:54
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Originally Posted by tdracer
I don't get any sound with the video (is that the case for everyone, or is it related to my computer?)....
No sound here either - the video is from a ramp surveillance camera.
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Old 15th May 2024, 23:21
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As much as we do appreciate your consistency tdracer; America can do wrong. Fair enough. How are you pleased that it's an Airbus?

However it's plugged into JFK/Mogadishu

Meanwhile in the 21st century, this an example of how not to do things.

In the meantime "roll the trucks full of excuses".

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Old 15th May 2024, 23:23
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No, I don't care it's not Boeing (although the press sure as hell would be all over it if it was).
I never said no one did anything wrong - just pointing out that, without knowing when Fire and Rescue was called, it's pretty early to criticize the Fire and Rescue response time.

Or does it make you happy this happened in your hometown?
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Old 15th May 2024, 23:29
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Originally Posted by alfaman
Obviously back in the overhead locker or under the seat - that's likely to cause more issues blocking access to those behind, than just leaving with it.
Apologies, but my understanding was internationally "In the interests of safety, leave carry on luggage behind"
No idea if it is a decree or a law.
I carry my passport , documents and wallet on my person, incase such a situation should develop.
But hey, Old Skool !!
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Old 16th May 2024, 10:16
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What worries me far more than the passengers, is the number of ramp workers who can be seen just milling around and doing nothing while this electrical arcing was going on. There's a guy near the nose and a guy and a small truck in front of the starboard wing, who just walk or drive away.

Either they did not see the problem - in which case why were they not being more observant ? - or they did see it and did nothing.

GPUs have red emergency STOP buttons, and I would like to hope that a ramp worker would be able to realise that electrical arcing, fire and black smoke was not normal, and hit the STOP button. Or at the very least; run up the steps and alert the flight deck.
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Old 16th May 2024, 10:35
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Originally Posted by DaveReidUK
Because that shape makes it impossible for it to fall down its hole ?
This was a question from a Google interview I believe, their answer was because manholes are round!
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Old 16th May 2024, 11:28
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Uplinker, precisely. Hence my "Leaders of the free world...unbelievable" jibe.
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Old 16th May 2024, 19:44
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Originally Posted by Uplinker
What worries me far more than the passengers, is the number of ramp workers who can be seen just milling around and doing nothing while this electrical arcing was going on. There's a guy near the nose and a guy and a small truck in front of the starboard wing, who just walk or drive away.

Either they did not see the problem - in which case why were they not being more observant ? - or they did see it and did nothing.

GPUs have red emergency STOP buttons, and I would like to hope that a ramp worker would be able to realise that electrical arcing, fire and black smoke was not normal, and hit the STOP button. Or at the very least; run up the steps and alert the flight deck.
You are asking an awful lot from the average US ramp worker. Turnover at some airports is less than 90 days.
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Old 16th May 2024, 20:38
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OMG, this doesn't look positive.

let's see details on aviators herald
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Old 17th May 2024, 03:19
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Interesting, did the cabin crew re-engaged the doors!
I should have thought the ground power was from a unit on the air-bridge and dolly, not a mobile diesel unit; there was a person running towards the bridge wheel truck unit.
The older single aisle aircraft I have worked on had a lanyard to be attached to an anchor on the wing top surface to guide pax from overwing exits (pre air slides) and then to slide down the TE flaps.
Pax on wing had watched flight US1549 evacuation or subsequent film.
Most airports in my days positioned a mobile fire extinguisher during engine starts.

Last edited by aeromech3; 17th May 2024 at 03:48.
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Old 17th May 2024, 09:40
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My puzzles here: the 400Hz ground power connections have '2' short pins which complete a hold on circuit such that if the connection becomes loose the power through the standard pins is disconnected to prevent arcing.
The aircraft is very sensitive to accepting ground power, it must be clean and of very tight tolerance.
Aircraft are designed various ways to Not mix ground and aircraft power.
The ground power source also has safety and will not hold in otherwise.
Worn cable sockets or damaged rubber would be a possibility, as the aircraft is relatively young and aircraft pins not likely to be subject of abusive or weather.

Last edited by aeromech3; 17th May 2024 at 11:57. Reason: wrong letter typed.
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Old 17th May 2024, 11:13
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Originally Posted by aeromech3
My puzzles here: the 400v ground power connections have '2' short pins which complete a hold on circuit such that if the connection becomes loose the power through the standard pins is disconnected to prevent arcing.
Which aircraft use 400 V external power? Did you mean 400 Hz?
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Old 17th May 2024, 11:30
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Originally Posted by aeromech3
My puzzles here: the 400v ground power connections have '2' short pins which complete a hold on circuit such that if the connection becomes loose the power through the standard pins is disconnected to prevent arcing..
I was involved in an incident like this years ago. The E and F pins were shorted together. The power stayed on and I had to yank the ground power cord off the aircraft. The cord continued arcing until the GPU was shutdown.
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Old 17th May 2024, 11:30
  #40 (permalink)  
 
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Far more likely that the GPU / Airbridge power cable was damaged in some way, by being run over for example.

The sense pins and conductors to enable the power to be fed might have been OK, but perhaps there was a deep gash in the cable which allowed two main conductors to arc.

Or possibly, the connector itself was damaged by being run over or trapped in some way, so the main pins, (sockets actually), might have been loose inside the connector and arcing together.

Either way, it's good revision for us all to remind ourselves where the emergency stop buttons are during our walk-arounds
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